Domen
Misico dux Vandalorum
No, I call skirmishes skirmishes. Both sides fought for several hours and knew who they were shooting at. Their "allies".
You apparently didn't read about it thoroughly enough.
The incident which took place near Lvov between elements of German Gebirgsjaeger-Regiment 137. of 2. Geb.Div. and Soviet reconnaissance battalion of 24. Tank Brigade involved three sides in fact - also some unit of Polish defenders of Lvov was involved in the exchange of fire. So nobody really knew who was firing to whom. And the exchange of fire by no means lasted for several hours. Everything was over after maybe half an hour (at most).
Or like German-Polish non-aggression agreement of 1934?
Do you understand the difference between non-aggression pact and military alliance?
Yes I do. The Ribbentrop-Molotov pact (and other, previous & later, Soviet-German agreements) was not a "non-aggression" pact.
In non-aggression pacts you do not agree on invading and partitioning other countries.
Poland had a non-aggresion agreement with Germany but also with Soviet Union (signed in 1932):
http://en.wikipedia.org/wiki/Soviet–Polish_Non-Aggression_Pact
Yes, we already discussed this - the Soviets attacked the Polish forces which were for some reason outside of Polish territory.
There was no something like "Polish territory" at that time.
Poland was a new-born state and the final shape of its borders was not yet determined.
Situation of the Soviet Union was similar, by the way.
What Poles were doing near Wilno and in Belorussia in the first place?
??? Living there. Those were local Poles. Check the German population census of Wilno from 1916:
http://en.wikipedia.org/wiki/Ethnic_history_of_the_Vilnius_region
http://en.wikipedia.org/wiki/Ethnic_history_of_the_Vilnius_region#1916_German_census
City of Wilna
1916
Poles (50.2%)
Jews (43.5%)
Lithuanians (2.6%)
Russians (1.5%)
Other (2.2%)
Total 140,800
Source: 1916 German census[15]
When the Red Army attacked Vilna, they fought against local Self-Defence units, formed by inhabitants.